有什么方法可以在JavaScript中的指定范围内生成一个随机数（例如从1到6：1,2,3,4,5或6）？

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If you wanted to get between 1 and 6, you would calculate:

Math.floor(Math.random() * 6) + 1  

Where:

1 is the start number

6 is the number of possible results (1 + start (6) - end (1))

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function randomIntFromInterval(min,max)
{
    return Math.floor(Math.random()*(max-min+1)+min);
}

What it does "extra" is it allows random intervals that do not start with 1. So you can get a random number from 10 to 15 for example. Flexibility.

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Math.random()

From the Mozilla Developer Network documentation:

// Returns a random integer between min (included) and max (included)

function getRandomInt(min, max) {
  return Math.floor(Math.random() * (max - min + 1)) + min;
}

Useful examples:

// 0 -> 10
Math.floor(Math.random() * 11);

// 1 -> 10
Math.floor(Math.random() * 10) + 1;

// 5 -> 20
Math.floor(Math.random() * 16) + 5;

// -10 -> (-2)
Math.floor(Math.random() * 9) - 10;

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